Dual-Hole Excitons Activated Photoelectrolysis in Neutral Solution

Sung Fu Hung; Zhi Zhong Chen; Chun Chih Chang; Chia Shuo Hsu; Ming Kang Tsai; Chia Cheng Kang; Hao Ming Chen

doi:10.1002/smll.201704047

Dual-Hole Excitons Activated Photoelectrolysis in Neutral Solution

Sung Fu Hung, Zhi Zhong Chen, Chun Chih Chang, Chia Shuo Hsu, Ming Kang Tsai, Chia Cheng Kang, Hao Ming Chen

Research output: Contribution to journal › Article

Abstract

II–VI semiconductors exhibit unique behaviors that can generate dual-holes (“heavy and light”), but the application in photocatalysis is still missing. Herein, an empirical utilization of light/heavy holes in a hybrid metal cluster-2D semiconductor nanoplatelets is reported. This hybrid material can boost the hole-transfer at the surface and suppress the recombination. Different roles are enacted by light-holes and heavy-holes, in which the light-holes with higher energy and mobility can facilitate the slow kinetics of water oxidation and further reduce the onset voltage, while the massive heavy-holes can increase the resulting photocurrent by about five times, achieving a photocurrent of 2 mA cm⁻² at 1.23 V versus RHE under AM 1.5 G illumination in nonsacrificial neutral solution. These strategies can be the solutions for photoelectrolysis and be beneficial for sustainable development in solar conversion.

Original language	English
Article number	1704047
Journal	Small
Volume	14
Issue number	14
DOIs	https://doi.org/10.1002/smll.201704047
Publication status	Published - 2018 Apr 5

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Keywords

cadmium selenide
light holes
nanoplatelets
photoelectrochemistry
photoelectrolysis

ASJC Scopus subject areas

Biotechnology
Biomaterials
Chemistry(all)
Materials Science(all)

Cite this

Hung, S. F., Chen, Z. Z., Chang, C. C., Hsu, C. S., Tsai, M. K., Kang, C. C., & Chen, H. M. (2018). Dual-Hole Excitons Activated Photoelectrolysis in Neutral Solution. Small, 14(14), [1704047]. https://doi.org/10.1002/smll.201704047

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abstract = "II–VI semiconductors exhibit unique behaviors that can generate dual-holes (“heavy and light”), but the application in photocatalysis is still missing. Herein, an empirical utilization of light/heavy holes in a hybrid metal cluster-2D semiconductor nanoplatelets is reported. This hybrid material can boost the hole-transfer at the surface and suppress the recombination. Different roles are enacted by light-holes and heavy-holes, in which the light-holes with higher energy and mobility can facilitate the slow kinetics of water oxidation and further reduce the onset voltage, while the massive heavy-holes can increase the resulting photocurrent by about five times, achieving a photocurrent of 2 mA cm−2 at 1.23 V versus RHE under AM 1.5 G illumination in nonsacrificial neutral solution. These strategies can be the solutions for photoelectrolysis and be beneficial for sustainable development in solar conversion.",

keywords = "cadmium selenide, light holes, nanoplatelets, photoelectrochemistry, photoelectrolysis",

author = "Hung, {Sung Fu} and Chen, {Zhi Zhong} and Chang, {Chun Chih} and Hsu, {Chia Shuo} and Tsai, {Ming Kang} and Kang, {Chia Cheng} and Chen, {Hao Ming}",

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AU - Hung, Sung Fu

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AU - Tsai, Ming Kang

AU - Kang, Chia Cheng

AU - Chen, Hao Ming

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N2 - II–VI semiconductors exhibit unique behaviors that can generate dual-holes (“heavy and light”), but the application in photocatalysis is still missing. Herein, an empirical utilization of light/heavy holes in a hybrid metal cluster-2D semiconductor nanoplatelets is reported. This hybrid material can boost the hole-transfer at the surface and suppress the recombination. Different roles are enacted by light-holes and heavy-holes, in which the light-holes with higher energy and mobility can facilitate the slow kinetics of water oxidation and further reduce the onset voltage, while the massive heavy-holes can increase the resulting photocurrent by about five times, achieving a photocurrent of 2 mA cm−2 at 1.23 V versus RHE under AM 1.5 G illumination in nonsacrificial neutral solution. These strategies can be the solutions for photoelectrolysis and be beneficial for sustainable development in solar conversion.

AB - II–VI semiconductors exhibit unique behaviors that can generate dual-holes (“heavy and light”), but the application in photocatalysis is still missing. Herein, an empirical utilization of light/heavy holes in a hybrid metal cluster-2D semiconductor nanoplatelets is reported. This hybrid material can boost the hole-transfer at the surface and suppress the recombination. Different roles are enacted by light-holes and heavy-holes, in which the light-holes with higher energy and mobility can facilitate the slow kinetics of water oxidation and further reduce the onset voltage, while the massive heavy-holes can increase the resulting photocurrent by about five times, achieving a photocurrent of 2 mA cm−2 at 1.23 V versus RHE under AM 1.5 G illumination in nonsacrificial neutral solution. These strategies can be the solutions for photoelectrolysis and be beneficial for sustainable development in solar conversion.

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10.1002/smll.201704047